It circled the Earth in obscurity for more than half a year, now the X-37B OTV-5 space plane has been conclusively identified by amateur satellite observers in a circular orbit 356 Kilometers in altitude.

A SpaceX Falcon 9 blasted into partly cloudy skies over Cape Canaveral on Thursday, carrying into orbit the U.S. Air Force’s X-37B winged space plane on a mostly classified mission to test out new technologies in space and perform a range of experiments out of public view as part of the program’s fifth flight to space.

Keeping up the pace, SpaceX checked off the Static Fire Test for the company’s 13th launch of the year, aiming for a September 7 liftoff from Launch Complex 39A at the Kennedy Space Center with the U.S. Air Force X-37B space plane heading off on its fifth mission.